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Tue Feb 10 03:06:02 CET 2015 · https://mail.python.org/pipermail/python-dev/2015-February/138103.html

On 02/09/2015 05:14 PM, Victor Stinner wrote:
> 
> def partial(func, *args, **keywords):
>     def newfunc(*fargs, **fkeywords):
>         return func(*(args + fargs), **keywords, **fkeywords)
>     ...
>     return newfunc
> 
> The new code behaves differently since Neil said that an error is
> raised if fkeywords and keywords have keys in common. By the way, this
> must be written in the PEP.

That line should read

    return func(*(args + fargs), **{**keywords, **fkeywords})

to avoid the duplicate key error and keep the original functionality.

--
~Ethan~

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